/Engine/Source/Developer/AssetTools/Public/IAssetTools.h
Converts the givenUTexture2Dto virtual textures or converts virtual textures back to standard textures and updates the related UMaterials
void ConvertVirtualTextures ( const [TArray](API\Runtime\Core\Containers\TArray)< [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * > & Textures, bool bConvertBackToNonVirtual, const [TArray](API\Runtime\Core\Containers\TArray)< [UMaterial](API\Runtime\Engine\Materials\UMaterial) * > * RelatedMaterials ) const